A Test Of $H _ { 0 } : \mu = 49$

Multiple Choice

A test of $H _ { 0 } : \mu = 49$ versus $H _ { 1 } : \mu < 49$ is performed using a significance level of $\alpha = 0.05$ . The value of the test statistic is $z = - 1.70$ .
If the true value of $\mu$ is 45 does the conclusion result in a Type I error, a Type II error, or ह correct decision?

A) Type II error
B) Correct decision
C) Type I error